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  • 1,725. Re: Wifi Constantly Dropping in Lion
    gphonei Level 1 Level 1 (0 points)

    Freducken wrote:

     

    I think if you have money in the bank to go that route, or even better to buy an airport extreme, I would say perfect. I actually wouldnt mind purchasing an airport extreme and leave all these issues behind, but my wallet and I aren't seeing eye to eye on that. LOL. The biggest slap in the face would be if the Airport Extreme had the same issue, LOL. I hope there is some light at the end of this tunnel for us. Sigh....

    It sounds like buying one of the USB wifi dongles works just fine.  If you don't have a lot of distance or harsh building structure to deal with, perhaps it would work for you.

  • 1,726. Re: Wifi Constantly Dropping in Lion
    WSR Level 1 Level 1 (30 points)

    gphonei wrote:

     

    WSR wrote:

     

    technomystic wrote:

     

    Re: wouldn't mind purchasing an airport extreme and leave all these issues behind.

    Sorry to dissappoint...but same issue with 3 different locations with 3 different version of Airport Extreme. (All running current firmware thank you.)

     

    Shame it didn't help you, but it fixed my nightmares instantly. I have a new Time Capsule, but I expect the WiFi part is the same as a new Airport Extreme.

    ......You may have had a problem with WiFi router compatibility/firmware issues and the new router fixed that for you.

     

    ....... it might be that Apple is using an obscure feature of 802.11n which is only correctly working on some of their routers, but might break under circumstances of too many devices connected, mode changes from n/b/g etc.

     

     

    I have tens of potential WiFi devices, be it PC, Apple or handheld.... All were perfectly happy until my Lion MBPro came to live with us.

     

    My original router was b/g only and so it was not an "n" problem. Only with the purchase of the TC did I change to n and 5GHz wherever possible.... which has been a big benefit to my network, so I do not begrudge having bought the TC..... Other people here can rightly be upset that a new device breaks something that was working perfectly well.

  • 1,727. Re: Wifi Constantly Dropping in Lion
    gphonei Level 1 Level 1 (0 points)

    Freducken wrote:

     

    Every solution posted on the various I have tried with no avail (probably a total of 30 hours dedicated to this by now, not including reinstall times of the OS. I downgraded to Snow Leopard, no joy. Clean installs of Lion and further troubleshooting 3 times over now, no joy. Used the Atheros firmware downgrade floating around in other posts, no joy. Set up static DHCP, no joy. Set up encryption other than WPA2, no joy. Set up without encryption and only MAC address listing, no joy. Installed only non wifi related Apple software updates over clean lion install, no joy. Installed only wifi related Apple software updat over clean Lion install, no joy. Deleted network location, keychain presets for airport connections, re established new location in wifi settings, no joy. I am sure I am missing other troubleshooting steps I have taken, but hey, I am not a robot.

     

    Here's what Apple Engineering sent me to do, and I don't have the problem.  The data this creates is pretty significant, but if you understand enough of the fetch_debug.sh, you can probably find the reason that the WiFi stack disconnected and that might be more revealing than anything else.

     

    Step 1: (Enable Logging)

    - Steps to enable Logging on the Mac:

    Launch Terminal and then paste this:

     

    sudo /usr/libexec/airportd debug +alluserland +alldriver +allvendor +LogFile

    sudo killall configd

     

    Step 2: (Reproduce the Issue)

    Now reproduce the issue. Once you reproduce it, please note down the time the issue occurred. Wait a minute before you proceed to Step 3.

     

    Step 3: (Send Apple information)

    Now copy the  the attached shell script (fetch_debug.sh) to your Desktop and run it in Terminal: (Remember to run it as root)

    sudo ./fetch_debug.sh

    This saves a file on your Desktop. Please email this to me along with the time the issue occurred. 

    Please email me the

    - SendToApple.tar.gz file saved on your Desktop ( from step 3 )

     

     

    Step 4: Disabling the logs ( Paste the command below in Terminal)

    sudo /usr/libexec/airportd debug -alluserland -alldriver -allvendor -LogFile

     

     

    -------------------------

    below is fetch_debug.sh

     

     

    #!/bin/bash

    cd ~/Desktop

    mkdir SendToApple

    sudo cp -R /var/log/* ~/Desktop/SendToApple

    echo getting mobility......Please Wait.. This can take a bit

    sudo /System/Library/Frameworks/SystemConfiguration.framework/Versions/Current/Resou rces/get-mobility-info

    sudo cp ~/Desktop/mobility-info* ~/Desktop/SendToApple

    tar cvzf ~/Desktop/SendToApple/kerneltar.tgz /var/log/kernel.* /var/log/wifi.log

     

     

    echo Scanning for networks now

    /System/Library/PrivateFrameworks/Apple80211.framework/Resources/airport -I -scan \

         >> ~/Desktop/SendToApple/airport_scan.txt

     

    echo Saving System Information Report

    system_profiler -xml -detaillevel full > ~/Desktop/SendToApple/systemProfiler.spx

     

    gnutar -cvf SendToApple.tar SendToApple/

    sudo rm -rf ~/Desktop/SendToApple

    sudo rm -rf ~/Desktop/mobility-info*

    gzip ~/Desktop/SendToApple.tar

  • 1,728. Re: Wifi Constantly Dropping in Lion
    Freducken Level 1 Level 1 (0 points)

    This is definitely worth a shot. It is exactly what the Apple guy had me do too, only I didnt look through the files myself. I will try this on the weekend 'cause for now I have to worry about other stuff.

     

    For now I will keep using WPA TKIP encryption which seems to mitigate the issue, of course, with a huge throughput decrease in my network. It seems to only happen when I am on WPA2 AES Encryption, but I don't think that, specifically, is the issue. Even when I'm on just N network without encryption the connection drops. When I am on N WPA TKIP the connection does not drop but I am also limiting my Router to B G Speeds because of the encryption so I am not really getting N. Somewhere in all this is my culprit, and I am sad to see in posts above that even getting an Airport Extreme may not solve the issue.

  • 1,729. Re: Wifi Constantly Dropping in Lion
    gphonei Level 1 Level 1 (0 points)

    Freducken wrote:

     

    This is definitely worth a shot. It is exactly what the Apple guy had me do too, only I didnt look through the files myself. I will try this on the weekend 'cause for now I have to worry about other stuff.

     

    For now I will keep using WPA TKIP encryption which seems to mitigate the issue, of course, with a huge throughput decrease in my network. It seems to only happen when I am on WPA2 AES Encryption, but I don't think that, specifically, is the issue. Even when I'm on just N network without encryption the connection drops. When I am on N WPA TKIP the connection does not drop but I am also limiting my Router to B G Speeds because of the encryption so I am not really getting N. Somewhere in all this is my culprit, and I am sad to see in posts above that even getting an Airport Extreme may not solve the issue.

    In particular, if anyone having this problem will open a terminal window and do

     

    sudo /usr/libexec/airportd debug +alluserland +alldriver +allvendor +LogFile

    sudo killall configd

     

    and then just wait for the problem to occur and look in the  /var/log/wifi.log file for what WiFi is seeing, that might be enough for many people.  If there is a driver problem, or something else weird going on, one of the other mentioned log files might be the place to look.

     

    When you are done with looking at the logs, remember to turn off all the logging with

     

    sudo /usr/libexec/airportd debug -alluserland -alldriver -allvendor -LogFile

     

    It might be a little bit of work to do this, but it could be very revealing.  If you find something in your log files that is interesting and indicative of your problem, you might go ahead and post it here so others can find that "text" in searches if they are trying to figure out what's going on.

  • 1,730. Re: Wifi Constantly Dropping in Lion
    handi Level 1 Level 1 (0 points)

    i just get a new 4. gen TCm and now i di have wifi drops to in ipad and iphones.

    1 hours all works fine, now in 15sec cycles on/dropped/on ... i change the TC to get a new one, but its the same.

    old TC 1. gen works fine with wifi over 3 years now this !!

    i readed now all this post about and there are a lot of user having this pain. and apple ? does nothing?

     

    bad story.

     

    in some post is a recommendation to get back to firmware 7.4.2, but apple does not give this firmware to get downloadable ...

     

    some post addresses the tc name without space ... not solveing.

     

    now i do try to get wothout WPA2, but there is no choice for WPA only, its mixed WPA/WPA2 or WPA ^^

    only possability to use WEP security ... what a shame for apple. i will try now after 2 days with restarts and reconfigs ... apple plug and use ? no more in this time, its no more betther than low cost products. all my neighbors without apple has wifi working fine

  • 1,731. Re: Wifi Constantly Dropping in Lion
    handi Level 1 Level 1 (0 points)

    reseted and reconfigured with WEP security .. still drop wifi in cylces

     

    one thing -> 1. configuration works 1 hour ok, than the first drop and furture in short cycles ... there is a standard config option with WPA2 setup -> under options Timeout WPA key and parameter is 1 h!

     

    in error reports are messages in this directions. so apple please solve this problem and do not furture ignore us customser!

  • 1,732. Re: Wifi Constantly Dropping in Lion
    jaydavidr Level 1 Level 1 (0 points)

    Like many other posting and replying herein, I have spend hours and hours putting up either with WiFi constantly dropping or dealing with AppleCare and two trips to the Genius Bar with no resolution. I lugged in my new iMac and the Genius found nothing mechanically/electronicly wrong. I had essentially done all that was recommended by Apple and by those in this discussion group. I was ready to go ballistic on my most recent venture to the Genius Bar and have security carry out a raving maniac unless I was provided with a solution. Luckily, that was not necessary. I just asked for and got a Genius knowledgeable on this wifi matter. He instructed me that when I got back to my iMac, to delete the entire SystemConfiguration folder under Library/Preferences. Previous advice asked that I delete just one of the ".plist" files. The Genius said he'd call me when I was back at home in front of my iMac, and see how that went. I deleted the entire SystemConfiguration folder and restarted as instructed. Wifi has since been maintained flawlessly, like in those far off days when under Snow Leopard, I didn't know what a wifi problem was. Apparently my particular problem was caused when I was using Migration Manager to set up my new iMac. Though I never intended to do so, I inadvertently "migrated" system configuration files from Snow Leopard. In addition to my constant connection, wifi comes back after sleep more quickly. I almost can't believe my wifi is now non-problematic, and have been nervously waiting for a reoccurrence. Over a week now, and my wifi has been unerringly constant. I think it's time to safely remove Airport Utility from my dock (where it never lived under Snow Leopard) and move on.

  • 1,733. Re: Wifi Constantly Dropping in Lion
    Billjacobson Level 1 Level 1 (0 points)

    I have been unable to see/find a SystemConfiguration folder under Library/Preferences   I'm thinking that this did not migrate from the upgrade to Lion, but it's merely a guess.  I'm wonderif if it could it be hidden?  I have unhidden system files.

     

    The mystery and PIA of the problems persists on this end.  Good to hear someone has a positive solution.

  • 1,734. Re: Wifi Constantly Dropping in Lion
    Freducken Level 1 Level 1 (0 points)

    Try this: While in Finder go to Go (top menu), then Go To Folder, type in (or copy Paste) /Library/Preferences which will open the folder where SystemConfiguration should be (it is filled with nothing but PLIST files).

     

    This is something that I have also tried (deleting all the plist files) but had no luck as the problem persisted shortly thereafter. I have since given up on trying to troubleshoot and bought a 25ft Cat6 cable. No disconnect problems since! lol

  • 1,735. Re: Wifi Constantly Dropping in Lion
    Billjacobson Level 1 Level 1 (0 points)

    Thanks Freducken...  I do see a systemconfiguration.plist file but not a folder.  I'll try deleting this plist... but like you nothing really works for long after deleting these.

     

    I connected a Cat6 cable to my macbook last night (most likely inspired by one of your earlier posts)  ... and the connection is fast and works.  Seems that my macbook will be the host for iMac from here on out.

     

    What a mess.  I've been fighting with this ever since installing Lion, then downgrading, then installing again. 

     

    You'd think that these 116 pages of posts would inspire Apple to help their loyal customers find a fix that works.  Ship then test. lol

  • 1,736. Re: Wifi Constantly Dropping in Lion
    Apostropher Royal Level 1 Level 1 (0 points)

    Hi Bill,

     

    Sorry if this is a stupid question, but are you looking in...

     

    Macintosh HD > Library > Preferences

     

    ...or...

     

    Macintosh HD > Users > [username] > Library > Preferences?

     

    Because the SystemConfiguration folder is in the first path. Well, it is on my iMac. Haven't tried deleting it yet, but will give anything a shot.

  • 1,737. Re: Wifi Constantly Dropping in Lion
    Billjacobson Level 1 Level 1 (0 points)

    AHA...  I couldn't find macintosh hd because it defaults to hidden:

     

    Under Finder Preferences, General, make sure, under "Show these items on the desktop" Hard Disks is checkmarked

    Thank you.

     

     

    I'll delete the folder and let you know results.

  • 1,738. Re: Wifi Constantly Dropping in Lion
    Billjacobson Level 1 Level 1 (0 points)

    Same ole S...tuff   I deleted the SystemConfiguration folder after finally finding the Finder > Preferences > Sidebar settings for what can be seen by the serfs.  Whewww... Thanks for the pointer.

     

    But, still not picking up Verizon MIFI 4510L    Dell, Macbook, iPad, iPhone find it fine. 

     

    My solution for now is using the macbook as the shared server, and connecting the iMac to macbook with ethernet cable.  Very clunky, but it works.

     

    And the internet connection is way faster that it has ever been when the iMac would some times connect to WIFI.

  • 1,739. Re: Wifi Constantly Dropping in Lion
    Carlo TD Level 3 Level 3 (550 points)

    Billjacobson wrote:

     

    Same ole S...tuff   I deleted the SystemConfiguration folder after finally finding the Finder > Preferences > Sidebar settings for what can be seen by the serfs.  Whewww... Thanks for the pointer.

     

    But, still not picking up Verizon MIFI 4510L    Dell, Macbook, iPad, iPhone find it fine. 

     

    My solution for now is using the macbook as the shared server, and connecting the iMac to macbook with ethernet cable.  Very clunky, but it works.

     

    And the internet connection is way faster that it has ever been when the iMac would some times connect to WIFI.

     

    And your sure you dont have any other wifi devices connected to it... maybe a printer? That device only handles up to five devices (which means it might handle five, might handle four, might handle three devices, might handle two devices. Its specificiations does not say will handle exactly five devices at any given time... the specifications say access up to five devices. You should contact the manufacture of your MIFI device and ask for a new instruction manual, or some one to explain what access up to five devices means.